body {
  font-family: "Segoe UI", Tahoma, sans-serif;
  background: #f9fafb;
  margin: 0;
  padding: 0;
  color: #333;
}

header {
  background: #2563eb;
  color: white;
  text-align: center;
  padding: 1rem;
  box-shadow: 0 2px 6px rgba(0,0,0,0.2);
}

h1 {
  margin: 0;
}

main {
  padding: 2rem;
  max-width: 1000px;
  margin: auto;
}

h2 {
  margin-top: 1rem;
  color: #2563eb;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 1rem;
  margin-top: 1rem;
}

.card {
  background: white;
  padding: 1rem;
  border-radius: 12px;
  box-shadow: 0 4px 8px rgba(0,0,0,0.1);
  transition: transform 0.2s;
}

.card:hover {
  transform: translateY(-3px);
}

footer {
  text-align: center;
  padding: 1rem;
  margin-top: 2rem;
  background: #f1f5f9;
  color: #555;
  font-size: 0.9rem;
}